A Dual Lewis Base Activation Strategy for Enantioselective Carbene-Catalyzed Annulations
作者:Javier Izquierdo、Ane Orue、Karl A. Scheidt
DOI:10.1021/ja405833m
日期:2013.7.24
activation strategy integrating N-heterocycliccarbene (NHC) catalysis and a second Lewis base has been developed. NHC-bound homoenolate equivalents derived from α,β-unsaturated aldehydes combine with transient reactive o-quinone methides in an enantioselective formal [4 + 3] fashion to access 2-benzoxopinones. The overall approach provides a general blueprint for the integration of carbenecatalysis with